Bar-channeling machine



{No Model.) 4 sheets-'sheen 1. P. A. HALSBY 8v A. DONBY.

BAR GHANNELING MAGHINE.'

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4'ISheet-S-Sheet 2. F. HALSEY 85 A. DONEY.

Patented Aug. 4, 1896.

(No Mode.)

y BAR GHANNELING MACHINE. N0. 564,993.

WWW I f wm- @l l 4 Sheets-Sheet 3. A. HA-LSEY 8L A. DNEY.

BAR HANNBLINGMACHINE. v

Patented Aug. 4 1896.

' (No Model.)

4 Sheets-Sheet (No Model.)

I'. A. HALSBY 8v A. DO-NEY. BAB GHANNBLING MAGHINB. No. 564,993. Patented-Aug. 4, 1896.

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UNTTED STATES PATENT @Prien FREDERICK A. HALSEY, OF NEV YORK, N. Y., AND ALFRED DONEY, OF PEN ARGYL, PENNSYLVANIA, ASSIGNORS TO THE RAND DRILL COMPANY, OF

MOUNT PLEASANT, NEV YORK.

BAR-CHANNELING MACHINE.

SPECIFICATION forming part of Letters Patent No. 564,993, dated August 4, 1896.

Application filed October 16, 1895. Serial No. 565,891. (No model.)

To all whom, zit may concern.-

Be it known that we,FRnDERIoK A. HALsnv, of NenT York city, New York, and ALFRED DONEY, of Pen Argyl, Pennsylvania., have invented certain Improvements in Bar-Chan neling Machines, of which the following is a specification.

This invention embraces a variety of devices applied to a bar-channeling machine for 1o improving its mode of organization, increasing its speed of operation, rendering it easy of control by the operator, and facilitating the adjustment of its parts.

In a bar-channeling machine a rock-drill and x5 its appurtenances are mounted upon a rectangular frame having its opposite ends pivotally connected to horizontal bars, each of which is adjustably supported upon two pointed legs which are themselves adjustable zo to various angles.

The first part of this invention relates, broadly, to tying the lower side of the rectangular frame to the said legs, and incidentally embraces the use for that purpose of diagonal brace-rods pivoted to the lower corners of the rect-an gular frame and adj ustably inserted through daring tubular sockets formed on adjustable collars adapted to both slide and turn on the legs, and provided with set-screws by means of which they may be fastened in any desired position. The said tubular sockets flare at both ends, and are each provided with a set-screW for tightening the brace-rod in the socket in the place and at the angle which may be required by the relative positions of the legs and frame.

The second feature of the invention consists of a splash-plate which is fastened to the lower part of and moves with the rock-drill 4o carriage and serves to intercept the splash from the channel in process of being cut.

The third feature of the invention consists of a readily-detachable guide adapted for loosely engaging and preventing the rotation of the cutting tool or tools. This device ren ders it unnecessary to employ the cross-head moving in slideways Vheretofore used in barehannelers, and besides diminishing the cost of the Wearing parts so great-ly lessens the Weight of the reciprocating mass that the ma- 5o chine can be run at a higher rate of speed than heretofore. The said guide is mounted in transverse ways, so that it is free to .yield bodily in a direction crosswise of the channel in process of being eut, and hence accommodate itself to the small variations in the angle of inclination of the tool which occasionally7 occurs in operation.

The fourth feature of the invention relates to mechanism for automaticallyr or manuallyT imparting the horizontal feed motions to the slidin g carriage upon which the rock-drill bed-plate is pivoted, and embraces the combination of the steam-cylinders and gearing for automatically feeding and automatically shifting the direction of the feed of the sliding carriage, with a clutch-lever susceptible of being manually moved into an inoperative position, and a hand-Wheel forman u ally moving the sliding carriage when the said clutch 7o lever, by being moved into its inoperative position, has Wholly released the sliding carriage from said autom atie feeding mechanism.

In bar-chann elers as heretofore constructed, Whenever it was required to move the roclrdrill in a horizontal direction to considerable distances for purposes of adjustment or otherwise, it has been necessary to employ the steam-actuated feeding mechanism for that purpose. By the expedient of disengaging the sliding carriage from its automatic feeding mechanism, and employing the hand- Wheel described, the operator is enabled not only to move the sliding carriage when no steam is on, but is enabled to move it with considerable rapidity as compared with the necessarily slow rate of movement imparted to it by the automatic feeding mechanism.

The fifth feature of the invention consists of a ratchet-wheel and two stop-paWls for preventing the feedscreW from being caused to rotate in either direction by the jar of the machine when in use, the said device being combined with a manually-operativc feed Wheel adapted t-o trip one or the other of the two paivls by the initial part of its rotation,

and to then impart rotation to the feed-serew to the extent and in the direction required. This device releases the operator from the necessity, existing in bar-channelers as heretofore constructed, of constantly keeping his hand on the feed-wheel. By merely so turning the feed-Wheel as to move the feed-screw a sufiicient distance to provide work for the machine for a few minutes the operator can leave himself free to devote his attention to other matters, such as tightening` loose joints in steam-pipes, or tightening a loose bolt or making various adjustments without stopping themachine.

The sixth feature of the invention consists of a simple and effective device for throwing the rotation-ratchet into or out of action when occasion arises for changing the operation of the machine from that of channeling to that of drilling the end holes of a channel, or vice versa.

The seventh feature of the invention consists in the employment of a channel-bit made of a single piece of steel provided with a multiplicity of cutting edges in place of bits made in gangs, as heretofore, which have proved difficult to maintain of proper length because they are liable to wear unequally.

In pursuance of the intent to lighten the machine whenever permissible the invention also embraces a device employing short bolts for securing the upper and lower tul'iular members of the main swinging frame to the end members thereof, by the use of which the usual long bolts extending horizontally through the entire length of the tubular members of the frame are dispensed with.

XVhile these improvements are independently useful, their association in a single machine, as herein described, is especially advantageous, because of the resulting lightness and portability of the machine and its capacity of rapid adjustment, whereby it is especially adapted for employment in situations where the bottom of the quarry is rough and irregular and where short channels are required, involving frequent moving of the machine.

The accompanying drawings of. a bar-channeler containing the improvements are as follows:

Figure l is a front elevation, partly in section, in which portions of the longitudinal members of the main frame are represented as .broken out. Fig. 2 illustrates a detail of construction of the frame. Fig. 3 is a transverse section of the machine, taken through the vertical planes indicated by the offset dotted line 0c .frv on Fig. l. Fig. 4 is a side elevation of one of the socketed collars for firmly connecting the diagonal brace-rods to the legs. Fig. 5 is a longitudinal horizontal section of the same. Fig. G is a view of the lower part of the rock-drill bed-plate, showing in front elevation the box which contains the tool-guide. Fig. 7 is a top view of the guide-boX, partly in horizontal section, taken through the plane indicated by the dotted line 1/1/ on Fig. 6. Fig. 8 is a top view of the stop-block and a portion of the sway-bar for shifting the clutches. Fig. 9 is a vertical section substantially in the plane indicated by the dotted line e e on Fig. 8 and showing details of the mechanism for automatically reversing the direct-ion of the horizontal or side feed of the carriage. Fig. 10 is a rear elevation of the double pawl-and-ratchet device for preventing the jarring of the machine from actuating the vertical feed mechanism. Fig. 1l is a top View, partly in section, showing the device for rendering the rotary feed mechanism inoperative. Fig. 12 is a top view of two of the diagonal braces, showing in section the construction of the portion of the swinging frame to which the diagonal braces are pivoted, and also showing in section the adjustable sockets on the legs, in which the diagonal braces are secured by set-screws.

In the bar-channeler represented in the drawings the operative parts of the machine are mounted upon the usual oscillatable rectangular frame A, pivoted to two transverse horizontal bars B B, each end of each of which is supported upon an adjustably-inclined pointed leg O. Each leg is provided with a loosely-fitting collar C', adapted to be fastened to the leg by the set-screw C2, and hav ing formed upon it a tubular socket C3, the aperture through which flares at both ends. The sockets are also provided with set-screws C'l for the purpose of fastening in the sockets the diagonal brace-rods D, each of which at its inner end D is pivotally connected to the lower corner of the frame A, and extends outwardly therefrom through the socket C3 upon that one of the legs C which is adjacent to it. The frame A is composed of two vertical members E E', the upper horizontal member F, the lower horizontal member F', and the middle horizontal member G. The rockdrill cylinder and its appurtenances are mounted upon the usual swinging bed-plate H, pivotally supported upon the carriage l. adapted to slide to and fro upon the upper and lower horizontal members F and F of the frame, for that purpose being provided with a cylindrical two-part jaw I', embracing the upper horizontal member F of the frame. and the two-part jaw I2, embracing the lower horizontal member F' of the frame. To the under part of the lower jaw l2 there is fastened a splash-plate J, which is thus made to travel to and fro with the sliding carriage and serves to intercept the splash from the channel in process of being cut.

At a slightly higher level than the splashplate is a guide-box K, provided upon its rear side with a vertical tongue K', adapted to seat in a vertical groove K2 in the lower part of the rock-drill bed-plate. On its rear side the guide-box is provided with laterally-projecting flanges K3 K3. It is also provided with Log a removable cap K1. The cap is secured to the box and the box is secured to the rockdrill bed-plate ll by the laterally-swinging latch-bolts K5 K5, pivoted to the bed-plate H, extending outwardly therefrom through notches in the side iianges K3 K3, and through corresponding notches K11 KG in the cap K4,

and provided upon their outer en ds with nuts K7 K7, adapted when screwed home to bear upon the face of the cap K4 after the latchbolts have been swung into the notches described.

The guide for the tool, or steel, as it is commonly called, consists of two similar pieces K8 KS, which upon their meeting faces are provided with vertical grooves adapted to loosely embrace the shank of the tool. They are also provided at their upper and lower ends with laterally-projecting anges K9 K9 K9 K11, fitting loosely upon the top and bottom of the box and cap.

On reference to Figs. 3 and '7 it will be seen that the space within the guide-box K from front to rear is wider than the Width of the guide, and that opportunity is thus aiforded for a bodily lateral yielding movement of the guide in a direction which is crosswise of the plane of the channel which is being cut. It will also be seen that the top and bottom of the box K constitute ways upon which the ii( nges K9 K9 K9 K9 of the guide bear, and which define the path of travel of the guide during its bodily-yielding movements.

Then occasion arises for changing the tool, the nuts K7 K7 are unscrewed and the latchbolts are then both swung laterally. This releases the cap K51 of the box K, so that the tool, after having been unfastened and lowered from the chuck to which when in use its upper end is fastened, can be removed from the box,

` together with the two pieces KS K8 of the guide,

after which it can be removed from the guide by separating the pieces K8 K8. The guidepieces K8 Ks can then be slipped onto the shank of another tool and replaced in the box K, after which the cap K4 is reapplied and the box and cap being held at the proper elevation the latch-bolts K5 K5 are swung inward into their proper notches and the nuts screwed home upon the face of the cap K4. The new steel having` been fastened in the chuck is then ready for use.

The sliding carriage has mounted upon it two steam-engines L L' for rotating the wormshaft L2, having affixed to it the balancewheel L3 and the two worms L1 and L5, meshing, respectively, with two worm-wheels M and N, which are keyed to hubs loosely mounted upon the transverse shafts M' and N. The shaft M has a bearing in the box M2, formed integrally with the box-frame M3, which straddles the middle bar G of the frame A and is fastened to the camiage I bya suitable number of bolts, two of which, M4 M4, are shown in Fig. 3. The shaft M' has affixed to its inner end a pinion M5, which meshes only with the teeth of the horizontal rack M, bolted to the lower part of the middle bar G. As shown in Fig. 3, the shaft M" extends outwardly through and beyond the hollow hub M7, to which the worm-Wheel M is keyed. The hub M7 is afforded a bearing in the supplemental box-frame MS, which is secured to the box-frame M3 by a suitable number of bolts, two of which, M9 M9, are shown in Fig. 3. The outer face of the hub M7 is provided with dogs. adapted for engagement with correspondin g dogs on the adjacent face of the clutch-box M10, which is loosely splined to the projecting outer portion of the shaft M', and is so constructed as to present a circumferential groove for receiving the tongue M11 of the ring M12, which is loosely connected with the adjacent arms of the clutch-shifter by the pivots M13 M13. The description thus given of the worm-wheel M, the shaft M', its box, clutch, dro., applies as a description of the worm-wheel N, shaft N', and its box and clutch, with the following exceptions: First, the shaft N' is arranged at sufficiently higher level than the shaft M so that its pinion N5 meshes only with the teeth of the horizontal rack M14, bolted to the upper part of the middle bar Gr of the frame A. The Worm-wheel N and Worm L5 are of slightly greater diameters than the worm-wheel M and worm L4, but are of the same relative proportions. Secondly, the shaft N' projects somewhat farther forward than the shaft M' and has affixed to its outer end a hand-wheel O, by means of which, when the clutches are appropriately adjusted, the shaft N' can be rotated and the sliding carriage I thus be moved manually in either direction.

The clutch-shifting device consists of the vertical rock-shaft P, having its bearing in the box P', bolted upon the supplemental boxframe M8. The collar P2, secured to the lower end of the rock-shaft P, is provided with two radially-projecting arms P3 and P4, both having forked ends for pivotal connection with the clutch-box rings. The forked end of the arm P3 operates the clutch-box loosely splined on the shaft M', and the forked end of the arm P4 operates the clutch-box loosely splined on the shaft N The upper end of the rock-shaftPhas fastened to it the backwardly-extending swaybar P5, the free end of which springs upwardly toward the under side of the stop-block Q, connected to and moving with the supplemental box-frame M3. The stop-block Q has on its under side two recesses Q' and Q2, serving as stops for the sway-bar P5. When the sway-bar by being seated against the under side of the partition Q3 between the two recesses Q and Q2 occupies its median position, so that both clutches are freed from engagement with the hubs of the worm-wheels, the carriage I can be moved manually by turning the hand-wheel O. IVhcn the sway-bar is seated in the recess Q', as illustrated in IOO IIO

Figs. 3, S, and 9, the arm P3 is rocked inward and the shaft M', being thus clutched to the worm-wheel M, is automatically fed in the direction, say, from right to left.

The rear end of the sway-bar 'P5 is loosely contained in the recess R, formed upon the under side of the projection R', extending downward from the horizontal slide-bar R2, loosely seated in a suitable bearing formed in the stop-block Q. In addition to being slotted upon its under side to admit of the protrusion of the projection R', the stop-block Q is also provided with slots on its upper side to admit the lugs R3 and R4, extending upwardly from the slide-bar R2. As the carriage l approaches the end of its excursion to the left the lug R3 is Carried into collision with the yielding and resilient sleeve S, loosely mounted upon the fixed sleeve S', adjustably secured to the horizontal bar T, which is fastened at its opposite ends to the side members E E' of the frame A. After the collision of the lug Rvwith the yielding and resilient sleeve S and so long as the sway-bar l5 re mains seated in the stop Q' the continued movement of the carriage l compresses the coiled spring S2, abutting at one end against the fiange of the sleeve S and at its opposite end against the fiange of the fixed sleeve S' upon the bar T. The stop-block Q is also suitably recessed and slotted to afford bearing for the horizontal tripbar U, provided upon its under side with a projection U', in which is formed a comparatively wide notch U2, the bottom of which presents two oppositely-inclined bearings U3 and U4, adapted to bear upon the upper edges of the sway-bar The trip-bar U is also provided with two upwardly-projecting lugs U5 and UG. J ust before the carriage I reaches the end of its excursion to the left the lugU5 is carried into collision with the ange of the fixed sleeve S', and the motion of the trip-bar U being thus arrested the inclined bearing U3 forces the sway-bar P5 down until it clears the stop Q', whereupon the compressed spring S2 expan ds and acting through the medium of the the lug R3 drives the slide-barR2 to the right and thus shifts the sway-bar P5 into the recess This opens the clutch of shaft M' and closes the clutch of the shaft N', and thereby reverses the direction of the slidin g carriage I.

At the corresponding point in the excursion of the carriage l to the right the lug R'L is carried into collision with the corresponding sleeve T' and compresses the spring T2 until the lug UG, by collision with the flange of the fixed sleeve T3, arrests the further movement of the trip-bar U and thereby causes the inclined bearing Uil to force the sway-bar downward out of the stop Q2 and thereby free it to the action of the force stored up in the compressed spring T2, whereby the swaybar P5 is reversed in position and seated again in the stop Q'. The trip-bar U is also provided at one end with a handle U7, or, if desired, both ends of the trip-bar U may be provided with handles by means of which the trip-bar can be conveniently reciprocated and the sway-bar be thereby seated in either of the stops Q or Q2 or be left at rest in its median position.

For abundant caution, in order to steady the parts in their movements the box-frame M3 has secured to it a standard V, provided with a lateral perforation, through which the bar T extends, the stop-block Q being directly secured to the standard V and being thereby connected with the box-frame M3.

The vertical feed mechanism of the rockdrill cylinder embraces the usual screw-bolt a, engaging a rotatable nut a', journaled in a fixed bearing a2, deriving its support-from the bed-plate H. The nut a' is rotated in the usual way by means of the pair ci; of miter-gears from the horizontal shaft l), journaled in the tubular bearing c, formed integrally with the bracket c', which is fastened to the bed-plate H. The outer end of the shaft l) has rigidly affixed to it a hub Z9', from which there projects a pawl-carryin g arm b2. to which are pivoted two pawls b3 and b4. The pointed ends of the pawls, which are lpressed toward each other by the springs b5 and lf, bear upon the opposite sides of the fixed wheel CZ, the periphery of which is provided with teeth d and grooves d2, which are rectangular in their cross-sections- The opposed sides of the pawl-arms h3 and h4 are provided, respectively, with the shoulders 127 and 118, which project into the path of motion of the pin e, affixed to the hub e' or' the hand-wheel e2 and projecting laterally therefrom through a concentrically-curved slot in the pawl-carrying arm b2. The hun e' of the hand-wheel e2 is loosely mounted upon the hub b' of the pawl-carrying arm t2 and is secured in position thereon by the washer e3, on the outside of which is a nut e". screwed on the outer end of the shaft Zi. When it is desired to raise or lower the rockdrill cylinder, for example, when it becomes necessary to operate the feed by lowering the range of movement of the tool, the handwheel e2 is rotated in the appropriate direction. -During the initial movement of the wheel e2 the pin e. is moved into collision with one or the other of the shoulders bl or D8 and thereby rocks one of the pawls b3 or b4, as the case may be, out of engagement with the teeth of the fixed wheel (Z. By further rotation of the handwheel e2 the pin c is carried against the adjacent end of the slot in the pawl-carrying arm b2 and thereafter communicates its own rotary motion to the pawlcarrying arm, and hence to the shaft l), while the pawl which has not been rocked rides over the teeth of the fixed wheel d. NVhen the hand-wheel e2 is released, the previouslydisengaged pawl springs back against the fixed wheel d, which, being thus engaged ov IOO IIO

both pawls, is thereby prevented from yielding to any influence such as might result fromy the jarring of the machine, tending to rotate it in either direction.

The mechanism for rotating the tool step by step when the machine is used for drilling holes consists of the usual spiral bar f, having affixed to its upper end the ratchet-Wheel f', contained within the usual pawl-chamber f2, provided with a multiplicity of pawlsffs, which are spring-pressed against the ratchetwheel f", and by preventing its rotation compel the piston to rotate during its stroke in one direction to the extent to which the piston compels the ratchet-wheel to rotate during its stroke in the opposite direction.

The device for rendering the rotary feed inoperative when the machine is to be used for channeling consists of a cam-shaped disk g, provided with notches g in its periphery, which, when the disk is appropriately adjusted, permit the pawlsfgf3 to spring into engagement with the teeth of the ratchetwheelf', as shown in Fig. 1l. The disk g is aiiixed to the lower end of a shaft g2, extending upward through the cap of the pawlchamber and having affixed to its outer end the radius-arm g3. A spring-latch g4, affixed to the arm g3, is adapted to be seated in approliriately-situated notches g5, formed in the boss f6, projecting upward from the cap of the pawl-chamber.

By swinging the arm g3 in the appropriate direction and thus seating the latch g4 in the appropriate notch in the boss g* the pawls f3 f3 will be rocked outward and held clear of the ratchet-wheel f', so that the ratchetwheel f', having been rotated in one direction by the upstroke of the piston, will simply be rotated in the opposite direction by the downstroke thereof, and hence no rotary motion will be imparted to the piston.

It is customary to employ for channeling a gang of tools or bits arranged side by side, and such an arrangement may of course be employed in the present machine. Even in an ordinary machine the employment of a gang of tools is subject to the objection that it is difficult to preserve them of uniform length, because they are apt to wear unequally, and that difficulty is much increased if the machine be run at the high rate of speed which is rendered attainable and permissible by the improvements herein described. To avoid this difficulty, the tool is made of a single fiat bar 7i., provided with a multiplicity h of cutting edges, which, being made of the same piece of steel, are likely not to wear unequally when in use.

The device for securin gthe horizontal members to the end members of the swinging frame is shown in section in Fig. l in connection with the horizontal member F and the end member E, on referring to which it will be seen that the end of the tubular member Fis seated in the usual recess formed on the face of the end member E. A short bolt c' extends through the end member E and is provided upon its screw-threaded outer end with the nut The head i2 of the bolt is seated within the yoke j, the end of which is perforated to admit the insertion through it of the shank i3 of the bolt i.' The yoke is introduced into the end of the tubular member F and its legs 7" j' are perforated to allow the insertion through them of the barrel of the stud 75, such insertion being permitted by apertures on opposite sides of the shell of the tubular member F. The said apertures are provided with slots extending toward the end of the tubular member F,and these slots are of j ust sufficientl width to contain the trunnions 71a' le of the stud 7c. The yoke being pulled outward, the trunnions are seated in the ends of the slots referred to and the tubular member is bound to the end member by screwing the nut t" upon the screw-threaded outer end of the bolt fi home against the perforated boss Z, cast on the outer side of the end member E.

What is claimed as the invention isl. In a bar-channeling machine, the combination, as herein set forth, of a main swinging frame; four supporting-legs for supporting said machine; four diagonal brace-rods connected with the lower. part of said swinging frame; clamps upon said supporting-legs; s ockets connected to said clamps and adapted to permit the extension through them of said diagonal brace-rods; means for adj ustably fastening said clamps upon said legs, and means for adjustably securing said diagonal brace-rods in said sockets.

2. In a bar-channeling machine, the combination,as herein set fortlnof diagonal bracerods pivotally connected to the lower part of the main swinging frame, collars rotatable upon the supporting-legs of the machine, tubular sockets iiaring at both ends and connected to said collars and adapted to permit the extension through them of said diagonal brace-rods, means for adjustably fastening said collars upon said legs and means for adjustably securing said diagonal brace-rods in said sockets.

3. Asplash-plate, connected with the lower part of the sliding carriage upon which the operative parts of the apparatus are carried, for intercepting the splash from a channel in process of being cut.

4:. A box for containing a tool-guide, the said box consisting of a rear member adapted for connection with the lower part of the rockdrill-cylinder bed-plate; a cap constituting the front member of said box; laterally-swinging latch-bolts pivoted to said bed-plate and adapted to enter notches in the sides of the said two members of said box, and nuts upon the outer ends of said latch-bolts, whereby .when the said bolts are swung into said notches, and said nuts are screwed home upon the face of said cap, the two members of said.

box are fastened together and the box is fastened to said bed-plate.

5. In a bar-channeling machine a piston-rod reciprocating in a right line and provided with a chuck for holding the channeling-tool or gang of tools, in combination with a guide loosely embracing the shank or shanks of the said tool or tools, preventing the rotation thereof, and presenting therefor guide-surfaces substantially parallel with a prolongation of the right line forming the center line of the bar of the actuating-cylinder for the purpose of dispensing with the cross-head commonly employed, and thereby lightening the reciprocating parts.

6. In a bar-channeling machine employing a reciprocating piston-rod provided with a chuck for holding the channeling-tool or gang of tools, the herein-described device for dispensing with the cross-head commonly used, the same consisting,` of a bodilylaterally-yielding guide for loosely embracing the shank or Shanks of the said tool or tools, and ways for defining the yielding of said guide in a path orosswise of the plane of the channel which is being cut.

7. A tool-guide for loosely embracing the shank or shanks of a channeling-tool, or gang of channeling-tools, in combination with a bearing, or box, composed of separate members with its side walls bearing with a loose sliding fit upon said guide, but with its front and rear walls so far distant as to afford said guide a prescribed range of forward-and-backward movement, and means for retaining said guide in the bearing afforded for it by said box.

S. In a bar-channeling machine a sliding carriage carrying rock drilling apparatus, and mechanism for imparting lateral or horizontal feed movements thereto in relativelyopposite directions, said mechanism including a sway-bar for reversing the direction of said lateral feed movements, a stop-block intersectin g the plane of swaying movement of the said sway-bar and presenting' recesses serving as stops into which said sway-bar is adapted to seat itself; a slide-bar loosely connected with the end of the said sway-bar and a trip-bar for tripping' said sway-bar out of the said recesses or stops and in combination with said sliding carriage and said mechanism; a horizontal rod secured to the frame of the machine; two spring-supported sleeves carried upon said rod and adapted tol intersect prescribed parts of the path of movement of said slide-bar when said slide-bar is partaking of the movement of said sliding carriage; fixed collars upon said rod between said sleeves and the end of said rod and intersecting at prescribed points the path of movement of said trip-bar when said trip-bar is partaking of the movements of said carriage; ex-` pandin g springs arranged between said fixed collars and said sleeves whereby at a prescribed stage in the lateral movement of the sliding carriage in either direction the said slide-bar is carried into collision with the sleeve in front of it and made to compress the spring which bears upon said sleeves until the said trip-bar is carried into collision with the fixed collar` supporting said spring, and by such collision having been made to cease to partake of the sliding movement of the carriage, has operated to trip the said sway-bar out of the recess in which it was previously seated and has thus released the said slide-bar to the resilient operation of the previouslycompressed spring by the force of which the said sway-bar is swayed into its opposite position and the feed mechanism is thereby reversed.

9. In a bar-channeling machine automatically-operating mechanism for reversing the lateral {feed of the rock-drilling apparatus, the said mechanism including' independent motors mounted upon Vthe frame of the machine and a clutch-shifter manually detachable from the mechanism which actuates it automatically, and manually movable from one of its extreme positions to the other for the purpose of reversing the automatic lateral feed movements, or movable into a median position in which it operates to break the continuity of the gearing by which motion is transmitted from a power-driven shaft to effect the lateral feeding of the rock-drilling apparatus, and a manually-operative handwheel for imparting lateral movement to the sliding carriage upon which the rock-drilling apparatus is carried, when the continuity of the said gearingis disestablished by the movement of the said clutch-shifter to its median position.

10. In a bar-channeling machine in which the rock-drilling apparatus is carried upon a carriage adapted to slide upon horizontal members of the frame of the machine, mechanism including independent motors mounted upon said frame for automatically imparting lateral or horizontal feed movements to said sliding carriage and for automatically reversing the direction of such movements in combination with mechanism, susceptible of being actuated manually for imparting lateral sliding movements to the said sliding carriage, and means for disestablishing the continuity of said automatically-operating feed mechanism.

1l. In a bar-channeling machine, the com- 'bination as herein set forth of the down-feed hand-wheel loosely mounted upon a shaft geared to the vertical feed-screw, a pawl-carrying arm affixed to said shaft, a finger connected to said hand-wheel and intersecting the plane of motion of said arm, a ixed toothed wheel adjacent to said pawl-carrying arm, a pawl pivoted to said paWl-carrying arm and adapted to normally engage the teeth of said fixed wheel and thereby prevent any down-feeding motion of said feed-screw, a shoulder on said pawl intersecting the path of motion of said finger whereby when the IOO IIO

irs

said hand-Wheel is turned in the direction required for the down feed the said finger first trips the said pawl ont of engagement with said toothed Wheel and then communicates the rotary motion'of the said hand-Wheel to the sai d paid-carrying arm and the said shaft. 12. In a bar-channeling machine employing mechanism for eiecting a rotary feed of the piston, which mechanism includes the usual ratchet-Wheel and spring-pawls for engaging the teeth of said ratchet-wheel, a. mannallyi operative cani for throwing and holding said pawls ont of engagement with said ratchet- Wheel.

FREDERICK A. HALSEY. ALFRED DONEY. W'itnesses as to Frederick A. Halsey:

W. E. WEEKS, F. A. BEAINERD. Vitnesses as to Alfred Doney:

JOHN H. BAKER, I. H. STETLER. 

